Mitsubishi Outlander (2013+). Manual - part 486
TROUBLESHOOTING
ELECTRIC POWER STEERING (EPS)
37-15
(2) Turn the ignition switch from the "LOCK" (OFF)
position to the "ON" position.
(3) Check if the diagnosis code is set.
Q: Is the diagnosis code C1514 set?
YES :
Replace the EPS-ECU (Refer to
).Then go to Step 7.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
Malfunctions ).
STEP 7. Check whether the diagnosis code is
reset.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from the "LOCK" (OFF)
position to the "ON" position.
(3) Check if the diagnosis code is set.
Q: Is the diagnosis code C1514 set?
YES :
Replace the steering column shaft
assembly (Refer to
). Then go to
Step 8.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
Malfunctions ).
STEP 8. Check whether the diagnosis code is
reset.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from the "LOCK" (OFF)
position to the "ON" position.
(3) Check if the diagnosis code is set.
Q: Is the diagnosis code C1514 set?
YES :
Return to Step 1.
NO :
This diagnosis is complete.
Code No.C1521 Motor turning angle (output)
Code No.C1522 Motor turning angle range
CAUTION
• If there is any problem in the CAN bus lines,
an incorrect diagnosis code may be set. Prior
to this diagnosis, diagnose the CAN bus lines
(Refer to GROUP 54C, CAN Bus Diagnostics
Table).
• Whenever ECU is replaced, ensure that the
CAN bus lines are normal.
OPERATION
Power is supplied to the resolver from the EPS-ECU.
FUNCTION
To output the voltage based on the motor rotation
angle to the EPS-ECU, the voltage is supplied to the
resolver.
TROUBLE JUDGEMENT
Check Conditions
The power supply circuit system diagnosis code (No.
C1540, C1541) is not set.
Judgement Criterion
The resolver input voltage or the resolver output volt-
age does not meet a predetermined voltage stored in
the microcomputer, and the microcomputer deter-
mines that there is a problem in the resolver system.
Fail Safe, Back Up Function
The EPS-ECU stops the motor control and illumi-
nates the electric power steering warning display,
then sets the diagnosis code No. C1521 and C1522.
PROBABLE CAUSES
• Malfunction of CAN bus line
• Defective resolver of the steering column shaft
assembly
• Defective harness wire(s) or connector(s)
• Short or open circuit between the EPS-ECU
and the resolver or loose connector contact
• Malfunction of the EPS-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the CAN bus lines (Refer to GROUP
54C
− CAN Bus Diagnostics Table ). On
completion, go to Step 2.
STEP 2. Diagnosis code recheck after resetting
CAN bus lines
(1) Erase the diagnosis code.
(2) Turn the ignition switch from the "LOCK" (OFF)
position to the "ON" position.
(3) Check if the diagnosis code is set.
Q: Is the diagnosis codes C1521 or C1522 set?
YES :
Go to Step 3.
NO :
This diagnosis is complete.